291.
A B. C. D. D 292.
A C 293.
A B. C. D. D 294.
A B.
What kind of services is available through the Mobile ISDN? Video conferencing and secure telephony Broadcast quality audio File transfer and LAN routing All of the above.
The channel between the mobile equipment and the satellite for mobile ISDN 4.8kbps
B. 9.6kbps
C. 64kbps
D. 128kbps
provides up to of bandwidth?
Inmarsat-B MESs are able to . initiate telephony distress alerting. Activate telegraphy distress call.
choose which channel to initiate a distress call. start telephony and telegraphy distress call
If the ship select an invalid LES for a ship-originated distress call, the distress call will be omitted.
the NCS will replace the called LES ID field in the received distress ?access
then . request? message with the ID of the back-up LES and then transmit a ?distress access request relay? message to the back-up LES. C. D. 295.
A C 296.
A B 297.
Which of the following abbreviation has the meaning “message” for the letter “M”? MES B. INMARSAT
C. DMG
D. MSI
the distress call will also be acknowledged and be acted upon. Both B and C.
Which of the following has the similar meaning to the word “mandatory”? propositional B. compulsory C. optional D. not mentioned
Once a duplex telex call is established on a Priority 3 (distress) basis , the operator
can . A start to type the distress message B. use the stored message facility C. not send the distress message immediately D. Both A and B D 298.
A B C D C.
______ is the main mode to provide EGC service, and can be used to broadcast all ship?s call in a sea area, a certain sea area
all ship?s call in an INMAREAT area, an INMARSAT satellite coverage area area call , a circular or rectangular area or pre-desiganated area group call, a special fleet
messages to mobile terminal in
299.
A A 300.
A A 301.
coverage.
Messages include instructions to the CES for processing the messages in the form of 5 C1
B. 4
C. 8
D. 3
a special address header which consists of “C” codes.
In “C” codes in EGC services, code is the priority code.
B. C2
C. C3
D. C4
________receives MSI via INMARSAT SafetyNet service within the INMARSAT
B. an EGC receiver
C. a MF/HF radio D. a VHF R/T
A. a NAVTEX receiver B. 302.
A B. C. D. A 303.
A C. D. 304.
A telephone A 305.
__________ A D. 306.
A B. 307.
_________ A C. B. 308.
etc. to ships. A A
In the GMDSS, MSI broadcast will be made on two dedicated systems providing INMARSAT SafetyNet Service and NAVTEX SafetyNet service and COSPAS-SARSAT DSC system and Navigation Warning Service MF/HF radiotelephone with NBDP and EGC Service
EGC service can cover the globe _____________ besides the polar regions above 76 N and below 76 S
B. including the North Pole and the South Pole D. as far north and south as 70o
near-continuous automated reception on board ships, they are _________
Within the area of INMARSAT coverage,_____________ receives MSI via EGC receiver
The system for the broadcast and automatic reception of MSI by means of NBDP is VHF B. SES
SafetyNet
C. EGC
D
NAVTEX
B. NAVTEX receiver C. VHF R/T
D. MF/HF
radio
SafetyNet service.
_______ is intended to transmit general public information to groups of ships.
B. FleetNet
C. System Message
D. MSI
International SafetyNet and Navtex services promulgate MSI by means of FEC and ARQ radio and telex
B. Satellite and terrestrial communications D. NBDP
_______ is intended to transmit navigational warning and meteorological warning SafetyNet
B. FleetNet
C. System Message
D. MSI
309.
A C. A 310.
A. all vessels D. 311.
A C. D. 312.
A C. 313.
A C 314.
A C. C. 315.
A B. 316.
A C. D. 317.
A C. A 318.
A A 319.
A B.
SafetyNet is a maritime safety information broadcast service offering _________on free reception
B. free transmission D. dedicated transmission
suitable equipped ships.
dedicated reception
The International SafetyNet Service is able to address the call to____________ B. Selected groups of ships C. A particular ship D. A,B,C are all correct
The priority of EGC messages is classified by ____________ distress, urgent and safety urgent, safety and routine
B. safety and routine
D. distress, urgent, safety and routine
The quality of EGC messages is __________affected by the position of the ship, the sometimes
B. always
C. never
D. partly
time of reception and climate conditions.
All EGC messages ___________ owing to their nature of importance can suppress B. can be suppressed can not be suppressed D are to be suppressed C. If EGC receiver share a same antenna with INMARSAT SES, it means that it can from any Inmarsat satellite
B. via any appropriate Navtex and EGC station
D. from any RCC and coast station
receive MSI__________
via the satellite the SES is tracking
If a ship is not fitted with any automatic position-fixing aid, such as GPS, its position not key
B. be keyed
C
not be keyed
D
key
should _______ in EGC receiver at regular interval
The INMARSAT SafetyNet service covers ___________ the whole world
B
all Navareas
areas from A1 to A4 D. only four INMARSAT regions
It is preferable for ships lying ___________ to receive MSI to ensure safe navigation both at sea and in port at the anchorage
B. in international waters D. in narrow channel
EGC is a ________ part of INMARSAT-C component B. supportable
C. combined
D
complimentary
WWNWS broadcasts _________ kinds of navigational warnings by means of radio four
B. three
C. several
D. a lot of
for mariners.
320.
A C. B. 321.
A. time C. 322.
A C. 323.
A B. 324.
A A 325.
A B. C D D. 326.
A B. C. D. C. 327.
A D. 328.
A D. 329.
A C.
With the help of modern technology, ships are able to receive automated broadcast of by day or at night
B. almost round the clock D. from sunrise to sunset
safety messages ________.
somewhat and sometime
The INMARSAT SafetyNET service is a _____________service B. meteorological warning C. SafetyNET terminal D. on-board
In “C” codes in EGC services, code is the address code. C1 B. C2 C. C3 D. C4
In “C” codes in EGC services, code is the service code. C1 B. C2 C. C3 D. C4
In “C” codes in EGC services, code is the presentation code. C5 B. C2 C. C3 D. C4
The pre-programme of EGC includes . keyed in the relevant NAVAREA/METAREA number input the number of NAVAREA
select the message types which the ship needed
all of above
In GMDSS, the purpose of broadcasting MSI is to . promulgate meteorogical warning and meteorogical forecast transmit navigational warnings
improve safety of shipping to avoid distress
relay distress alerting
In Area A4, can be used to broadcast MSI. EGC B NAVTEX C. A1A D MF/HF CFEC
The coverage of EGC is . Area A1 and A2 B. Area A1 C. Area A4 D. Area A1 ,A2 and A3
EGC replace NAVTEX because of . can, the same coverage
B. maybe can, the same coverage
can?t, different mode of broadcast D. can?t, different needs by different ships
D. 330. EGC system can be used to broadcast MSI to ships navigating in , it consists of .
A B. C.
Area A1, CES and EGC receiver
Area A2, information centre，CES and EGC receiver Area A3, Inm-C CES, NCS and SES
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